Variable-speed gearing.



M. M. FISHER.

VARIABLE SPEED GEARING.

APPLICATION HLED APRJZS, 1914.

Patented July 25, 1916.

3 SHEETSSHET l.

I rum/r01; [Va [00M 273/767" m I 4110M M.IM. FISHER.

VARIABLE SPEED GEARIN'G.

APPLICATION mzo NPR. 29. 1914.

1 1 92,777. Patented July 1mm.

- a SlfiETS-SHEET 2.

. 1 .7 J 6 I v WITNESSES:

MAYTQN M. FISHER, OF OAKLAND, CALIFORNIA.

VARIABLE-SPEED GEABIN G.

Specification of Letters Patent.

Patented July 25, 1916.

Appiicetion filed Apri129, 1914. Serial No. 835,191.

To all whom it may concern:

Be it known that l, lilAYTON M. Fieunn, a, citizen of the United States, residing at Oakland, in the county of lrlziineda and State of (.lelifornin, have invented certain new and useful Improvements in 'nrinbhz- Speed Gearing, of which the following is it specification.

This invention relates to improvements in transmission devices and more particularly to' meane for transn'iitting I.)()W0l.f!'01l1 :1 motorcycle engine to the rear wheel thereof.

One of the principal objects of this inven tion is to provide a compact and efficient mechanism located entirely within the rear hub of the motorcycle wheel by which the power applied thereto is caused to rotate the wheel at one of two diiierent speeds.

Another object is to provide a clutch in connection with the transmitting device whereby the engine may be entirely disconnected from. the wheel.

Another object of my invention is to pro vide transmissions in which only spur gears used.

With these and other objects in view my invention consists in the novel construction and arrangement of parts as herein described and more specifically pointed out in the eppended claims,

Reference being had. to the a companying drawings forming :1 partof this. specification wherein,

Figure 1 is a view in longitudinal section through the rear hub of a motorcycle having my improved tralisniision installed therein.

1g. 2 is it view in section on 2-2 Fig. 1. Fig. 3 is a view in section on 3'--3 Fig. 1. Fig. l is at viev in section on Fig.1. Fl. 5 is view on the same line located in V the opposite direction. Fig. 6 a detail viev parallel to the axis of rotation showing the hollow sleeves and part contained therein.

.llefinring to corresponding pelts through out the several views by the same numerals of reference, 1 denotes the rear forks of :1 motorcycle frame in the lower end of which is held the axle 2.

3 denotes the wheel hub having the usual flanges 4 to receive the wire spokes 5.

Revohilily mounted about the axle 2 is 21, sleeve 6 having tooth gear 7 integrally formed intermediate the ends thereof. This sleeve on one side of the gear is provided with a. plurality of slots end in the portion thus slotted an interior here 0 adapted to receivecertain o ierating devices. The other end 10 of this sleeve is reduced in diameter and threaded to receive the hell race 11, which rz-ice contains groove eoaicting with a stationary race 12 in the hub of the end plate 13. Tljie opposite end of the sleeve is shouldered, and fitting against the said shoulder n bell race 15 J()21Cllll with a. hall rice 1% in the sleeve 16, and. the said sleeve revoluhly mounted on hull hearings in said races.

The gear 7 meshes with an internal gear 18, which is formed integrally with an eX- ternnl tooth gear 15), which. in turn meshes with an internal tooth wheel 2G attache to the interior of the hub 3. The centers of gears 18 end 11. are thus placed eccentric with the centers of sleeve (3. gears 7 and 20, and the former gears 18 and i9 rotate upon a series oi balls :61 resting in it turn 13:2 be tween the disks i5 5 and 24. which disks in turn are provided with ecccntilr hell races 15 and ill} coasting with races ll and 27 upon the reduced end of sleeve (3. The disks 23 and 24 AFC held in spaced relation hy nieansoi' thin shims 128 and are held t gether by serene 29, the removal of the shim perinittin; :nljustnwnt of the hull races.

The dink 13 is held against rotation by the nut, 30 damping the mine against a. col la! 31 'l'ornwd on the axle :2. :Ilso by means of :i U-shapcd clzunp 25?. pas ing around the fork 1. formed in one wide of disk 4. is n rectnndulnr annular groove :53 and dish 13 p'i'ovidml with an annular llzmge 34. adapted to carry the he ll race 85. Huh I; has on this end an inwardl extending rim 36, which cwrries :i lmll race ii 'i concting with providing one hearing: for the hub 3. The upper porti n of lhingje -iis extended toward the center of the hula as shown at. 38 and at this point has 1 depending flange 39 wherein is a. ratchet toothei and roller all sented in this tooth allows the dish to rotate in one direction relative to the plate 13, but

prevents such movement in the opposite dil'cc 10D.

lfpon the exterior or" the hub between the spoke tlange l and the disk l); is formed a cylindrical surfac -21 upon which a hand brake is applied. The hand brake denoted by 12 can be of any pre't rrcd construction and together with the cylindrical lmb surface is lined with a frictional material it.

4-) denotes a sprocket wheel to which the power is applied to a motorcycle engine by means of a chain not shown, and this sprocket is revoiubly mounted on ball hear ings i and ii, the former also serving as a second bearing for the hub 23. The sprocket is formed integrally on a cylindrical annulu -15 having a plurality of axial grooves 49, the srid grooves being adapted to receive lugs .30 formed on the exterior of disks 51, which latter form a portion of the multiple disk clutch. The coacting disks at of this clutch are provided with the interior lugs 50, which extend into the grooves 8 and are thereby held in fixed relation to the sleeve (3. The outer end of G is screw threaded and held thereon by a nut 53 is a plate 52 carrying on its outer periphery a ball race for btaring -17, this plate also serving as'an abutment tor the clutch disks.

Mounted within the bore 9 is a ring 5i formed with integral arms adapted to slide in the slots b, and on the outer end of these arms is attached a plate 56, which normally tends to press against the outer disk 51 by means of a spring :37 abutting against certain pins 58 in the interior of cavity 9.

The disk 56 moved out of contact with the clutch disks through the medium of a. lever (10 connected to a suitable. operating handle within convenient reach of the rider. This lever is formed on the sleeve 16 pivot;- ally mounted on the axle through the medium ot' the ball bearing H1. The interior end (it this sleeve is termed with a cam surface 412 coacting with a similar shaped cam surtut-c; oz. in the ring U, which latter ring is held against rotation by means oi" a lug 5 extending in to a groove it; in the axle Suitable ball bearings (31' are interposed be,- tween disks til. and St to eliminate, the friction caused by the spring 57. In the hub 3 is formed an interior circumtercntial rib i which serves as an abutment for the plate Tlc which plate is provided at the. center ortion w ith clutch teeth 73.

rilidahly mounted on the exterior of sleeve #7 is a ring T23 having 1 hit h te th Tl dapted to enter the spacesbetween clutch teeth 72. Thi ring is; :lho provided with arms T3, whi h extend through the sl ts 8 and within the m n}. l a c connected to a ring i mo Hi! i: the sli-cve T'i' slidabiy along the moH-nicid lr. imparted to ihi-1 e 5 ans (j rod v cnd ng' ll bore in the :lsl. to lln-v outer end thereof where the said rod is provided ith a collar Mounted on the outside ot the fork 1 and held against, rotation is a hollow eylindrical sleeve 83 having on the exterior surface a plurality of steep pitched screw thread 8t. and. in engagement with these screw threads is a sleeve 54; having similar screw threads and an arm 85 by which it, may be. rotated. The end of this sleeve closed as at St; and provided with an opening therein adapted to tit the end of rod 80., the rod being cured thereon by means of a nut 87, which allows the rotation of the sleeve on the rod, but causes the longitudinal movement of the latter with respect to the sleeve 83. Slots. 90 are provided in axle 2 through which extend a pin 31 connecting the rod 8 with the sleeve 77 92 is a ctmntcrweight formed integrally on the member '21 adapted to balance this disk with respect to the axis of rotation.

The operation of this transmission as follows:--\\'hen arm (St) is moved rotating ring 16 so as to move the cam surface (31 out of engagement with the corresponding groove of cam surt'ace (325, this forces ring 5t toward the right compressing spring .37, and moving the disk (it; out of engagement with the clutch disks, thus allowing the latter to separate and the sprocket 45 to run free. \Vhen it is desired to start the motorcycle the arm til) is moved in the reverse direction causing the cam surface 622 to drop into the groove in cam surface 63 thus allowing the, ring at to move to the left under pressure of spring 57, and disk 56 to contact wi h 'the outer clutch disk pressing these di: ks together and frictionally transmitting the movement of sprocket lit to sleeve t' and thus to gear 7. The latter in turn transmits the power to gear 15%, which being formed integrally with it the latter in turn transmits the power to gear 20 and thus to the hub 3 causing rotation of the wheel.

lt will be apparent. that owing to the ratio between gears 7. 13, l.) and 20, that the hub will turn much more slowly than the sprocket. The gear ratio here illustrated being about t to 1. Under these, conditions the sit-eve 5 rotates in the hearings Hill 13, the gears 18 and It on bearings it, the member 21 being held stationary through the. a tion ol" the roller ratchet ltl. Now, when it is dcsind to run at high speed the arm 5 is rotated in such a direction on the threads Si that the sleeve Hl' moves: to the lcl't thus moving rod Ht) t the l ft. nd thro gh the cofiiicctions the clutch ring 'T-i. throwing tin teeth it into contact with teeth T2 thus placing the sleeve ti in direct c mmunication with the hub. The drive in this ase is from the pr cket thr ugh the i'll!ill\tto the ltl\t* or ring Til, the arms of which extend into th slot oi sleeve (3,

through the. coacting elnteh teeth, plate 71 to the hub, in which case the hub is rotated f aster than the motion which is transmitted through the intermediate gears. These gears being always in mesh rause the memlwrs 255 and A to be driven in the opposite direction from the driving tendency when gen r 7 alone was acting thereon causing the roller ratchet to release its hold and allow inn member .5 3 and J -lto rotate as a Whole ahont the axle 2.

it will thus be seen that l have proi irled a Simple. ellieient, and compact device which etl'oi-tirely accomplishes the ohieets set tor'lh in the beginning of the specification, and while I have shown the preferred embodiment of my invention it will be understood that changes may be made in minor (l0 ails of eonstruetion and form of parts, without, departing from the scope of the claims.

i. A power transmission met-hanism of the rharaeter deerrihed omprising a stationary a in, a sleeve revoluhle about said axle. a driving sprocket rerolnhle about said sleeve. a spoke huh rerolul ly mounted about said axle, an internally toothed gear attarhed to said hub. an eecentrie disk revoluhly mounted about said axle. ri idly (f0!!- neeted internally and externally toothed gears remlnhly mounted on said W'TL'PM, di h. a t thed gear form d on said sleeve alarm-d to mesh with said internally toothed said, integrally eonnerled externally ionlawl gran meshing with said internally to thed g ar attached to said huh. means for ronn rting said sprocket in drinng: relation t aid sleeve. other means for connevting aid sleeve in driving relation to said huh, and rah-her means for holding said errentrie stationary when .said first-unfairioned, row n -ting means only is in engagement.

P er transmission mm'hauiwn ol' the rhararter deserilaial comprising a stationary axle. supporting n'ieans For said axle. a sprorhet revoluhle about said axir a sleme rmoluhle on said axle. a dish clutch. winner-ting \tllli s n-whet, and said sleeve, means to artuate said elntrh. a spoke huh revoluhle on said aXle. a jaw i uteh :nlapte l to z'onnevt said sleeve and said iu'n. a toothed gear.

igilll gear on said sleeve. an errentrioally mounted internally toothed gear meshing WlilLSzii'i spur gear. a ser ml spur runrentrir with said internally lwvtliv. and r1 lly mounted with re pect 7 an internally toothed gear e ne ntrii \ri'" said huh and r gidly attached thereto. said last mentioned gear meshing: Willi said setnllll spur near, an errentrie dish rewilnhly mounted about said sleeve. said first mentivned internally toothed gear and said erond mentioned apur gear revolulily mount d on the periphery said ereentrio dielo and ratchet means to prevent the forward rotation of said entric dish when said disk rlntrh only engagement with said sleeve A, pom-r transmission nuashanisln oi' the rhararter d serilieai comprisii'i-g a sta tionary axle. a v' upportmg strneturo for said. axle. a sp ke huh r rl-iluhly mounted about aaid axl a some \rtv revolnl le about said axle, a, sleeve rerolunle on said axle a inulli ed to traneniit. the

pie dis-l; (-lulrh ada power from the said pziorltet to said sleeve,

nuans to act i: sat dutch, an internally toothed rlutrh nwmher slidahly mounted on said sleeve. arms on said elutrh member extending through slots in said sleeveto the interior thereof. means connected to said arms for moving}; said rlnteh member axially along said sleeve, a enacting clutch dish attar-lied to the spoke huh, a toothed gear formed intermediate the ends of the sleeve, an annulus rarrying an internally toothed gear and an externally toothed gear, 'saiil first mentioned gear meshing with said in ternally loothral gear, an internally toothed gear attarhed to the inside of said huh, said heat mentionrd gear meshing With the ex ternally toothed gear on said annulus, an err-entrie (lis reroluhly mounted on said sleeve. said :uinulns revoluhly mounted on said rm-entrio disk said disk having a race- \ra'v te m d on the side thereofi an end pl iv for saitl huh held etationary on said axle and having: an ins-lined rem adja -ent the ton of said rat nay. a Wal er in said in-- vlii ed rrr to prevent rotation t aaid disk in one \lirertion and allow m wmrni in the other dirt m.

ed g aring (w'nnprising a men-la r. a driven member. a turd sleeve retoluhle on said axle, (hitch means for w meeting said driving member to said slow and other elutrh means for rennet-ting said sleeve to said driven nuanl)!?l. a tootl i gear formed on aid sleeriaan erirentrie (ix reroinhly mounted on said sleeve, ri I! connected plan tary internally and internally toothed gears revolulily' mounted on said di an internally toothed to driren member and i'hr h ilding: said disk station axle. a

ar .J 2 espect to said axle when said rlriv-- inn memher is ronnerted to ;--tl(l sleeve by l'm'duhly n'munied 1, said disk and connecting the gear un said rah-me with the gear in in said (lmwn awmhur and ratchet means for holdil'lg said disk siationaly when driving said driven na mbm through said first-11mm- Liunml (tmmutlling means and said planetary gval's.

In hestimony whereof I aflix my signature ll-0501100 of two 'WIUIQFSBS.

)MVYTUN M. F'j H FR.

\Yi messes-n W. A. Shim hi, RL'TII E. FlSHi-LR. 

